Gordman Robert. (2006). Must-Have Customer: 7 steps to winning the customer you haven't got. Truman Talley Books St.Martin Press.
Chicago-Zitierstil (17. Ausg.)Gordman Robert. Must-Have Customer: 7 Steps to Winning the Customer You Haven't Got. NewYork: Truman Talley Books St.Martin Press, 2006.
MLA-Zitierstil (9. Ausg.)Gordman Robert. Must-Have Customer: 7 Steps to Winning the Customer You Haven't Got. Truman Talley Books St.Martin Press, 2006.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.